' Back in the day ' when I was completing my apprenticeship as a bricklayer one thing I enjoyed the most was constructing arches and once I ' pushed the envelope ' further and actually constructed a barrel vaulted brick ceiling in the college workshop, albeit without the skylights and of a smaller scale about 4' high and 8' long. Now i run my own construction company and there isn't much of that type of work about anyway, all good fun though.
Anyway, before I get bumped down to 'Way off topic ', Tintrun, your car collection is impressive, to say the least, and welcome to this fantastic club.
Ray